public void testToString() {
   final BitIndex index = BitCreate.createIndex(2, 5);
   index.set(1, 31);
   assertEquals("Index [2]" + LS + "[0]     0,    31" + LS, index.toString());
 }
 public void testLengthEmpty() {
   final BitIndex index = BitCreate.createIndex(0, 5);
   // test toString() when all zeroes
   assertEquals("Index [0]" + LS, index.toString());
 }